Bleeding/clotting disorders and rare blood diseases

Some people are born with an increased tendency to form blood clots, which increases their risk for developing blood clots in the legs (deep vein thrombosis) and in the lungs (pulmonary embolism).

Hemophilia is a rare genetic bleeding disorder. It runs in families and is almost always seen in males. Hemophilia occurs when blood clotting factors don't work as they should. Blood clotting factors help stop bleeding after a cut or injury. Learn more about hemophilia.